diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 724ecec4..ab2f846b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -3,6 +3,7 @@
 ## 提前沟通
 尽量把自己的想法和实现思路提前沟通，可以通过issue,钉钉,QQ都可以，可能很多问题我们内部已经讨论过，由于各种原因后续不会支持，但是您这边又开发好了，这样容易浪费您的时间。
 ## 代码规范
+请先按照阿里巴巴代码规约！！！https://plugins.jetbrains.com/plugin/10046-alibaba-java-coding-guidelines    
 目前代码规范已经集成了自动校验，然后源代码尽量不要有中文注释。在新增功能的时候，尽量注意补充junit。core代表每次travis-ci都会跑的测试案例，然后demo用于对外看到，temp里面随便写。
 ## 提交分支
 建议提交到最新的版本号.x上面，比如 3.x之类的版本，为了方便其他同学阅读源代码，所以目前的思路是master和maven center的最新版本代码保持一致，然后您提交过来的代码我们可能会稍微做一些修改。所以提交到开发分支会比较好。fork也可以直接fork该分支。
diff --git a/src/main/java/com/alibaba/excel/analysis/v07/handlers/CellTagHandler.java b/src/main/java/com/alibaba/excel/analysis/v07/handlers/CellTagHandler.java
index fd584a28..a6fd5340 100644
--- a/src/main/java/com/alibaba/excel/analysis/v07/handlers/CellTagHandler.java
+++ b/src/main/java/com/alibaba/excel/analysis/v07/handlers/CellTagHandler.java
@@ -17,9 +17,6 @@ import org.apache.poi.xssf.model.StylesTable;
 import org.apache.poi.xssf.usermodel.XSSFCellStyle;
 import org.xml.sax.Attributes;
 
-import org.apache.poi.xssf.usermodel.XSSFCellStyle;
-import org.xml.sax.Attributes;
-
 /**
  * Cell Handler
  *
@@ -48,7 +45,7 @@ public class CellTagHandler extends AbstractXlsxTagHandler {
 
         // Put in data transformation information
         String dateFormatIndex = attributes.getValue(ExcelXmlConstants.ATTRIBUTE_S);
-        Integer dateFormatIndexInteger;
+        int dateFormatIndexInteger;
         if (StringUtils.isEmpty(dateFormatIndex)) {
             dateFormatIndexInteger = DEFAULT_FORMAT_INDEX;
         } else {
@@ -74,53 +71,6 @@ public class CellTagHandler extends AbstractXlsxTagHandler {
         StringBuilder tempData = xlsxReadSheetHolder.getTempData();
         String tempDataString = tempData.toString();
         CellDataTypeEnum oldType = tempCellData.getType();
-        switch (oldType) {
-            case STRING:
-                // In some cases, although cell type is a string, it may be an empty tag
-                if (StringUtils.isEmpty(tempCellData.getStringValue())) {
-                    break;
-                }
-                String stringValue = xlsxReadContext.readWorkbookHolder().getReadCache()
-                    .get(Integer.valueOf(tempCellData.getStringValue()));
-                tempCellData.setStringValue(stringValue);
-                break;
-            case DIRECT_STRING:
-            case ERROR:
-                tempCellData.setStringValue(tempData.toString());
-                tempCellData.setType(CellDataTypeEnum.STRING);
-                break;
-            case BOOLEAN:
-                if (StringUtils.isEmpty(tempDataString)) {
-                    tempCellData.setType(CellDataTypeEnum.EMPTY);
-                    break;
-                }
-                tempCellData.setBooleanValue(BooleanUtils.valueOf(tempData.toString()));
-                break;
-            case NUMBER:
-            case EMPTY:
-                if (StringUtils.isEmpty(tempDataString)) {
-                    tempCellData.setType(CellDataTypeEnum.EMPTY);
-                    break;
-                }
-                tempCellData.setType(CellDataTypeEnum.NUMBER);
-                tempCellData.setNumberValue(BigDecimal.valueOf(Double.parseDouble(tempDataString)));
-                break;
-            default:
-                throw new IllegalStateException("Cannot set values now");
-        }
-
-        if (tempCellData.getStringValue() != null
-            && xlsxReadContext.currentReadHolder().globalConfiguration().getAutoTrim()) {
-            tempCellData.setStringValue(tempCellData.getStringValue().trim());
-        }
-
-    @Override
-    public void endElement(XlsxReadContext xlsxReadContext, String name) {
-        XlsxReadSheetHolder xlsxReadSheetHolder = xlsxReadContext.xlsxReadSheetHolder();
-        CellData tempCellData = xlsxReadSheetHolder.getTempCellData();
-        StringBuilder tempData = xlsxReadSheetHolder.getTempData();
-        String tempDataString = tempData.toString();
-        CellDataTypeEnum oldType = tempCellData.getType();
         switch (oldType) {
             case STRING:
                 // In some cases, although cell type is a string, it may be an empty tag
@@ -158,13 +108,10 @@ public class CellTagHandler extends AbstractXlsxTagHandler {
 
         if (tempCellData.getStringValue() != null
             && xlsxReadContext.currentReadHolder().globalConfiguration().getAutoTrim()) {
-            tempCellData.setStringValue(tempCellData.getStringValue());
+            tempCellData.setStringValue(tempCellData.getStringValue().trim());
         }
 
         tempCellData.checkEmpty();
         xlsxReadSheetHolder.getCellMap().put(xlsxReadSheetHolder.getColumnIndex(), tempCellData);
     }
-        tempCellData.checkEmpty();
-        xlsxReadSheetHolder.getCellMap().put(xlsxReadSheetHolder.getColumnIndex(), tempCellData);
-    }
 }